USA TODAY is providing full coveragethroughout the three-day event, which wraps up Thursday when Mitt Romney accepts his party's presidential nomination. Check your local TV listings for more coverage.

Here is our guide to the five things to watch on Tuesday, Aug. 28:

1)Ann Romneywill speak during the 10 p.m. ET hour of programming. Her remarks are aimed at showing the delegates -- and millions of TV viewers -- a softer side of her husband.

2) Romney will be followed byNew Jersey Gov. Chris Christie, who will deliver the keynote address. Christie, a populist favorite who ignored pleas to run for president this year, told USA TODAY that he plans to "tell some very direct and hard truths to people in the country about the trouble that we're in."

3) The traditionalroll call of the statesformally nominating Romney for president will be conducted in the afternoon and end in time for the evening newscasts. No surprise here, but it's a piece of business that's a staple of political conventions.

4)Rick Santorumemerged as the conservative alternative to Romney during the GOP primaries. He fell short, but the ex-Pennsylvania senator gets to tell his story about being the son of immigrants and the fight in Congress during the mid-1990s to overhaul welfare.

5) Four years ago, Alabama congressmanArtur Daviswas in Denver nominating Barack Obama for president. Now, Davis is a Republican supporting Romney, and he's got some strong things to say about the Democratic Party he left behind.